A frozen oasis lies beneath the scorching New Mexico desert.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

An Irish Memorial commemorating those who perished due to potato blight.

The first American department store, and home to the largest operating musical instrument in the world.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

This elaborate towering structure was once famed for its revolutionary height.

Dr Barnes' $25 billion private collection of art and arboretum.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

The oldest surviving botanic garden in the United States.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

After the musical legend's death, his memorial was mysteriously graffitied in gold.